DOUBLE G0 Guitar Preamplifier Preamp Pickup Acoustic Chorus Delay Reverb Effects Soundhole Pickup with Built-in Rechargeable Battery for 95-110mm Diameter Sound-hole Guitar

Sound hole installation, no need drill hole, easy to install. preamplifier is suitable for mounting on guitars with sound hole diameter during 95~110mm.;Cork pad clamp design, no damage to paint of instrument.;It is a pickup that can be operated on your mobile phone (download free APP: Double+).;It has various DSP effects, including compress, reverberation, chorus and delay.;It supports active recording, wireless output, BT audio, really a magical preamp.